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Math Help - hard time with these word problems

  1. #1
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    hard time with these word problems

    i need help with a couple of questions:

    Suppose the generator is asked to produce 10,000 numbers between 20 and 25. Find the expected value and the standard deviation of this data?


    Brand A sells for $12, B for $25, C$40. Of the USBs sold: 65% from Brand A, 25% from B and 10% from C. The profit for the company is 40% of the retail value, so y=4x for the rv for the profit. Find the expected value and the variance for the profit.
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  2. #2
    MHF Contributor
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    Re: hard time with these word problems

    Hey lrocha91.

    Check your other thread.
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